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* dtable.cc (handle_to_fn): Modify to return true if handle represents a cygwin

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tty.
(dtable::init_std_file_from_handle): Detect when we've seen a cygwin pipe and
use it in overlapped mode by default.
(decode_tty): Make static.
This commit is contained in:
Christopher Faylor 2008-03-22 21:27:05 +00:00
parent 1ffe3e67b1
commit 88f0dc31d1
2 changed files with 38 additions and 17 deletions
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8
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,11 @@
2008-03-22 Christopher Faylor <me+cygwin@cgf.cx>
* dtable.cc (handle_to_fn): Modify to return true if handle represents
a cygwin tty.
(dtable::init_std_file_from_handle): Detect when we've seen a cygwin
pipe and use it in overlapped mode by default.
(decode_tty): Make static.
2008-03-22 Christopher Faylor <me+cygwin@cgf.cx>
* dtable.cc: Define various device-related string constants as wide

47
winsup/cygwin/dtable.cc
View File

@ -38,7 +38,7 @@ details. */
static const NO_COPY DWORD std_consts[] = {STD_INPUT_HANDLE, STD_OUTPUT_HANDLE,
STD_ERROR_HANDLE};
static void handle_to_fn (HANDLE, char *);
static bool handle_to_fn (HANDLE, char *);
#define WCLEN(x) ((sizeof (x) / sizeof (WCHAR)) - 1)
char unknown_file[] = "some disk file";
@ -284,18 +284,19 @@ dtable::init_std_file_from_handle (int fd, HANDLE handle)
DWORD ft = GetFileType (handle);
char name[NT_MAX_PATH];
name[0] = '\0';
if (ft == FILE_TYPE_PIPE)
if (ft == FILE_TYPE_UNKNOWN && GetLastError () == ERROR_INVALID_HANDLE)
/* can't figure out what this is */;
else if (ft == FILE_TYPE_PIPE)
{
handle_to_fn (handle, name);
if (name[0])
if (handle_to_fn (handle, name))
/* ok */;
else if (fd == 0)
dev = *piper_dev;
else
dev = *pipew_dev;
if (name[0])
access = FILE_CREATE_PIPE_INSTANCE;
}
else if (ft == FILE_TYPE_UNKNOWN && GetLastError () == ERROR_INVALID_HANDLE)
/* can't figure out what this is */;
else if (GetConsoleScreenBufferInfo (handle, &buf))
{
/* Console output */
@ -348,11 +349,11 @@ dtable::init_std_file_from_handle (int fd, HANDLE handle)
}
if (dev == FH_TTY || dev == FH_CONSOLE)
access = GENERIC_READ | GENERIC_WRITE;
access |= GENERIC_READ | GENERIC_WRITE;
else if (fd == 0)
access = GENERIC_READ;
access |= GENERIC_READ;
else
access = GENERIC_WRITE; /* Should be rdwr for stderr but not sure that's
access |= GENERIC_WRITE; /* Should be rdwr for stderr but not sure that's
possible for some versions of handles */
fh->init (handle, access, bin);
set_std_handle (fd);
@ -386,6 +387,7 @@ build_fh_name (const char *name, HANDLE h, unsigned opt, suffix_info *si)
return build_fh_name_worker (pc, h, opt, si);
}
#if 0 /* Not needed yet */
#define cnew(name) new ((void *) ccalloc (HEAP_FHANDLER, 1, sizeof (name))) name
fhandler_base *
build_fh_name (const UNICODE_STRING *name, HANDLE h, unsigned opt, suffix_info *si)
@ -393,6 +395,7 @@ build_fh_name (const UNICODE_STRING *name, HANDLE h, unsigned opt, suffix_info *
path_conv pc (name, opt | PC_NULLEMPTY | PC_POSIX, si);
return build_fh_name_worker (pc, h, opt, si);
}
#endif
fhandler_base *
build_fh_dev (const device& dev, const char *unix_name)
@ -866,13 +869,16 @@ dtable::vfork_child_fixup ()
}
#endif /*NEWVFORK*/
void decode_tty (WCHAR *w32, char *buf)
static void
decode_tty (char *buf, WCHAR *w32)
{
int ttyn = wcstol (w32, NULL, 10);
__small_sprintf (buf, "/dev/tty%d", ttyn);
}
static void
/* Try to derive posix filename from given handle. Return true if
the handle is associated with a cygwin tty. */
static bool
handle_to_fn (HANDLE h, char *posix_fn)
{
tmp_pathbuf tp;
@ -911,15 +917,21 @@ handle_to_fn (HANDLE h, char *posix_fn)
if (wcscasecmp (w32, DEV_NULL) == 0)
{
strcpy (posix_fn, "/dev/null");
return;
return false;
}
if (wcsncasecmp (w32, DEV_NAMED_PIPE, DEV_NAMED_PIPE_LEN) == 0)
{
w32 += DEV_NAMED_PIPE_LEN;
if (wcsncmp (w32, L"cygwin-tty", WCLEN (L"cygwin-tty")) == 0)
decode_tty (w32 + WCLEN (L"cygwin-tty"), posix_fn);
return;
if (wcsncmp (w32, L"cygwin-", WCLEN (L"cygwin-")) != 0)
return false;
w32 += WCLEN (L"cygwin-");
bool istty = wcsncmp (w32, L"tty", WCLEN (L"tty")) == 0;
if (istty)
decode_tty (posix_fn, w32 + WCLEN (L"tty"));
else if (wcsncmp (w32, L"pipe", WCLEN (L"pipe")) == 0)
strcpy (posix_fn, "/dev/pipe");
return istty;
}
@ -928,7 +940,7 @@ handle_to_fn (HANDLE h, char *posix_fn)
|| !QueryDosDeviceW (NULL, fnbuf, sizeof (fnbuf)))
{
sys_wcstombs (posix_fn, NT_MAX_PATH, w32, w32len);
return;
return false;
}
for (WCHAR *s = fnbuf; *s; s = wcschr (s, '\0') + 1)
@ -992,8 +1004,9 @@ handle_to_fn (HANDLE h, char *posix_fn)
NT_MAX_PATH);
debug_printf ("derived path '%W', posix '%s'", w32, posix_fn);
return;
return false;
unknown:
strcpy (posix_fn, unknown_file);
return false;
}